You searched for: “ophiolite
Any of a group of basic and ultrabasic igneous rocks, including serpentinite and serpentinized peridotite, gabbro, and diabase, which occur associated with pillow lava and radiolarian chert in a characteristic pattern of layers in the Alps and certain other regions and are thought to have been formed as a result of the submarine eruption of oceanic crustal and upper mantle material.
This entry is located in the following unit: ophio-, ophi-, ophid-, -ophis; -ophidio, -ophidia (page 3)